Submission #667634

#	Time	Username	Problem	Language	Result	Execution time	Memory
667634		Hacv16	Table Tennis (info1cup20_tabletennis)	C++17	Compilation error	0 ms	0 KiB

tabletennis

#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
const int MAX = 2e6 + 50;
const int INF = 0x3f3f3f3f;

ll n, k, ans;
vector<ll> v;

bool check(int j){
    vector<ll> aux;

    for(int i = 0; i < v.size(); i++){
        if(i == j) continue;
        aux.push_back(v[i]);
    }

    ll sum = aux[0] + aux[aux.size() - 1];

    for(int l = 1, r = aux.size() - 2; l < r; l++, r--)
        if(aux[l] + aux[r] != sum) return false;

    return true;
}

void bt(int i, int chosen, vector<ll> aux){
    if(chosen > n || i > tot) return;
    if(chosen + (tot - i) < n) return;

    if(i == tot){
        if(chosen == n){
            ll sum = aux[0] + aux[aux.size() - 1];
            bool isAns = true;

            for(int l = 1, r = aux.size() - 2; l < r; l++, r--)
                if(aux[l] + aux[r] != sum){ isAns = false; break; }

            if(isAns){
                for(auto x : aux)
                    cout << x << ' ';
                cout << '\n';

                exit(0);
            }
        }

        return;
    }

    vector<ll> sla = aux;
    sla.push_back(v[i]);

    bt(i + 1, chosen + 1, sla);
    bt(i + 1, chosen, aux);
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> k;

    if(n + k <= 18){
        vector<ll> trash;
        bt(0, 0, trash);
        return 0;
    }

    for(int i = 0; i < n + k; i++){
        ll x; cin >> x;
        v.push_back(x);
    }

    for(int i = 0; i < v.size(); i++)
        if(check(i)){ ans = i; break;}

    for(int i = 0; i < v.size(); i++){
        if(i == ans) continue;
        cout << v[i] << ' ';
    }

    cout << '\n';

    return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'bool check(int)':
tabletennis.cpp:14:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for(int i = 0; i < v.size(); i++){
      |                    ~~^~~~~~~~~~
tabletennis.cpp: In function 'void bt(int, int, std::vector<long long int>)':
tabletennis.cpp:28:26: error: 'tot' was not declared in this scope
   28 |     if(chosen > n || i > tot) return;
      |                          ^~~
tabletennis.cpp:29:18: error: 'tot' was not declared in this scope
   29 |     if(chosen + (tot - i) < n) return;
      |                  ^~~
tabletennis.cpp:31:13: error: 'tot' was not declared in this scope
   31 |     if(i == tot){
      |             ^~~
tabletennis.cpp: In function 'int main()':
tabletennis.cpp:75:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |     for(int i = 0; i < v.size(); i++)
      |                    ~~^~~~~~~~~~
tabletennis.cpp:78:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |     for(int i = 0; i < v.size(); i++){
      |                    ~~^~~~~~~~~~